Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Apple
AAPL
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
526
MBIA
MBI
$377M
| $402K | ﹤0.01% |
44,543
-20,912
| -32% | -$189K |
|
|
COW
527
DELISTED
iPath Bloomberg Livestock Subindex Total Return ETN due October 22, 2037
COW
| $402K | ﹤0.01% |
18,092
+18,033
| +30,564% | +$401K |
|
|
PGTI
528
DELISTED
PGT, Inc.
PGTI
| $401K | ﹤0.01% |
19,234
+16,297
| +555% | +$340K |
|
529
ScottsMiracle-Gro
SMG
$3.64B
| $396K | ﹤0.01% |
+4,762
| New | +$396K |
|
|
ARNA
530
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $395K | ﹤0.01% |
9,074
-14,608
| -62% | -$636K |
|
|
SHLX
531
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $394K | ﹤0.01% |
17,786
-23,132
| -57% | -$512K |
|
532
RingCentral
RNG
$2.89B
| $392K | ﹤0.01% |
+5,574
| New | +$392K |
|
|
CHL
533
DELISTED
China Mobile Limited
CHL
| $391K | ﹤0.01% |
+8,819
| New | +$391K |
|
534
Acadia Pharmaceuticals
ACAD
$4.26B
| $390K | ﹤0.01% |
+25,548
| New | +$390K |
|
535
Direxion Daily Aerospace & Defense Bull 3X Shares
DFEN
$327M
| $389K | ﹤0.01% |
8,748
-3,642
| -29% | -$162K |
|
536
NewMarket
NEU
$7.64B
| $389K | ﹤0.01% |
+963
| New | +$389K |
|
|
WPX
537
DELISTED
WPX Energy, Inc.
WPX
| $385K | ﹤0.01% |
21,369
+13,993
| +190% | +$252K |
|
538
KraneShares Bosera MSCI China A 50 Connect Index ETF
KBA
$219M
| $383K | ﹤0.01% |
+12,836
| New | +$383K |
|
539
Sherwin-Williams
SHW
$92.9B
| $383K | ﹤0.01% |
2,823
-5,238
| -65% | -$711K |
|
|
CPE
540
DELISTED
Callon Petroleum Company
CPE
| $382K | ﹤0.01% |
3,562
+2,447
| +219% | +$262K |
|
541
Toyota
TM
$260B
| $377K | ﹤0.01% |
2,933
+246
| +9% | +$31.6K |
|
542
Federated Hermes
FHI
$4.1B
| $376K | ﹤0.01% |
16,135
+14,921
| +1,229% | +$348K |
|
|
KEM
543
DELISTED
KEMET Corporation
KEM
| $372K | ﹤0.01% |
15,410
-26,398
| -63% | -$637K |
|
|
WBA
544
DELISTED
Walgreens Boots Alliance
WBA
| $371K | ﹤0.01% |
6,184
-1,834
| -23% | -$110K |
|
545
CyberArk
CYBR
$23.3B
| $370K | ﹤0.01% |
+5,887
| New | +$370K |
|
546
Deutsche Bank
DB
$67.8B
| $370K | ﹤0.01% |
34,914
+5,929
| +20% | +$62.8K |
|
|
HIMX
547
Himax Technologies
HIMX
$1.46B
| $370K | ﹤0.01% |
49,684
+41,605
| +515% | +$310K |
|
|
WRK
548
DELISTED
WestRock Company
WRK
| $369K | ﹤0.01% |
+6,481
| New | +$369K |
|
549
Ichor Holdings
ICHR
$579M
| $367K | ﹤0.01% |
17,319
+7,552
| +77% | +$160K |
|
|
ATTU
550
DELISTED
Attunity Ltd
ATTU
| $367K | ﹤0.01% |
31,652
+28,651
| +955% | +$332K |
|